Here I have shown the sample JSON object of my project
{
"objectType": "main",
"description": "",
"Column": "[{"displayName": "Account Name", "DataType" : "string"}, {"displayName" : "Billing City", "DataType" : "string" }, { "displayName" : "Billing State/Province" , "DataType" : "string" }, {"displayName" : "Billing Street", "DataType" : "textarea"}]"
}
It has some special characters like"/" (Billing State/Province) in the display name. Now it was not allowed to convert it to JSONArray and put in the RootJsonObject due to the special character in it. I had used the following code
RootJsonObject = new JSONObject();
RootJsonObject.put("content",new JSONArray(JsonObject.getString("Column")));
But I need that special character. Is there is any other way to have that "/" in my JSONObject or can I use any other JSON util.
I can see you've updated your question to include valid JSON for the Content property.
When deserialising this string to JSON, you will need to escape any special characters.
Apache StringEscapeUtils contains an escapeJson method which can do this for you:
RootJsonObject = new JSONObject();
String jsonArrayString = StringEscapeUtils.escapeJson(JsonObject.getString("Column"));
RootJsonObject.put("content", new JSONArray(jsonArrayString));
I am not 100% clear where JsonObject comes from or is populated but if the above does not work, you may need to escape the content earlier in the process somewhere.
Related
currently I retrieve a JSON object from algolia like this to my app:
{
"title": "Manajemen Masjid sesuai sunnah Rasulullah",
"address": "Jl. Tebet Utara I No.40, RT.8/RW.2, Tebet Tim., Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12820, Indonesia",
"additionalAddress": "",
"capacity": 0,
"city": "Jakarta",
"creatorIsVerified": true,
"description": "Dua aplikasi milik Facebook",
"email": "abcd#gmail.com",
"eventID": "000b4e1a-f65e-4d77-83ce-d0770d344d4b",
"eventType": "Kajian Umum",
"_geoloc": {
"lat": -6.2256428,
"lng": 106.8527658
},
"hasBeenApproved": true,
"numberOfContact": "081808664",
"price": 0,
"rankPoint": 300000000,
"speaker": "Syafiq Reza Basalamah",
"venue": "Aql Islamic Center 2",
"website": "http://www.lakuin.id"
}
as you can see, in this record, there is no "instagram" field in the JSON above. but other records have "instagram" field in the JSON. I have problem when parsing that JSON in my Android app because not all data has "instagram" field in it.
I parse the "instagram" field using this code, If the "instagram" field is not available from incoming JSON, then I want to assign an empty string like the code below:
val instagram = jsonObject.get("instagram") as? String ?: ""
the jsonObject data type is java class JSONObject (import org.json.JSONObject)
but that line will make a crash. error message:
Caused by: org.json.JSONException: No value for instagram
E/CrashlyticsCore: Unexpected method invoked on
AppMeasurement.EventListener: onEvent(java.lang.String,
java.lang.String, android.os.Bundle, java.lang.Long); returning null
so how to write code that can handle both case, either it has "instagram" field or not from the incoming json ?
As #Pemba Tamang suggested, use jsonObject.optString("instagram",""); or use gson library, it handles errors in json
You can use try , catch for that :
try{
// try to parse ur Json here
}catch (JSONException e){
// here you can assign the empty String
}
I am getting the following response from some service call . I am trying to parse the JSON . I am actually new to JAVA and not sure about how to parse JSON objects returned from HTTP call . I am getting the following error :
org.json.JSONException: JSONArray initial value should be a string or collection or array.
at org.json.JSONArray.<init>(JSONArray.java:197) ~[json-20180813.jar!/:na]
Code :
Object resp = hiveApiClient.getEnrollmentSearchDetails(certificate, employeeId);
logger.info("response : " + resp);
JSONArray mainArray = new JSONArray(resp);
// The nested array is at the second position : 1
JSONArray nestedArray = mainArray.getJSONArray(1);
// the interesting main JSONObject is on the first position
// of the nested array : 0
JSONObject interestingJSONObject = nestedArray.getJSONObject(0);
logger.info("XXX :{}", interestingJSONObject);
String courseId = interestingJSONObject.getJSONObject("additionalData").getString("courseId");
logger.info("XXXX :{}",courseId);
return courseId;
Response :
[
"list", [{
"#type": "com.saba.services.calendar.CalendarElementDetail",
"eventType": "ILTCLASS",
"elementName": "Microservice Application Architecture",
"elementId": "class000000000013497",
"eventId": "timel000000000103609",
"ownerID": "emplo000000000096641",
"locationId": "locat000000000003165",
"locationName": "IND-Bangalore-Karnataka",
"additionalData": {
"#type": "map",
"locationTimeZone": "tzone000000000000042",
"eventID": "class000000000013497",
"locationName": "IND-Bangalore-Karnataka",
"locationId": "locat000000000003165",
"transcriptID": "ofapr000000002962367",
"registrationID": "regdw000000001766254",
"eventName": "Microservice Application Architecture",
"moduleID": "regmd000000002147176",
"courseID": "cours000000000031995"
},
"startDate": {
"#type": "com.saba.customtypes.DateWithLocale",
"date": 1538613000000,
"locale": "03-OCT-2018",
"timeInLocale": "8:30 PM",
"dateInUserTimeZone": "03-OCT-2018",
"timeInUserTimeZone": "5:30 PM",
"dateInCustomTimeZone": null,
"timeInCustomTimeZone": null,
"customTimeZoneDate": 0,
"timeInStandardFormat": "8:30 PM",
"dateInStandardFormat": "10/03/2018"
}
}]
]
Well first of all, your json is not valid because of this}:
["list" : /* something here but anyway, not the concern here */ ]
when it should have been
{"list" : /* something here but anyway not the concern here */}
I think your problem is with the understanding of how a JSON file works and what is a json object and a json array. Please correct your JSON input so that we can provide you with insights on how to retrieve the value you need.
Additionally, I would recommend you looking into Jackson lib for parsing JSON objects to JAVA POJOs directly really easily. The link is a great tutorial to get you started here. Furthermore, jackson is already included with Spring so that you literally have nothing to install.
Edit
I misread the JSON input : I saw a : after "list" instead of a ,.
So your JSON is a proper JSON but its a quite uncommon JSON as it is loosely typed and therefore cannot be that easily parsed with standard Jackson library for example. In fact, in the main array, a string is put together with a Json Object which is a very bad practice but that's not your fault as I suppose you are not responsible for the output of this HTTP call.
So how can you actually get your value ? Well let's describe the JSON, you've got here : a JSON array containing a String and another sub JSON array. You want to take some values from the very first JSON object inside the nested json array.
This one :
{
"#type": "com.saba.services.calendar.CalendarElementDetail",
"eventType": "ILTCLASS",
"elementName": "Microservice Application Architecture",
"elementId": "class000000000013497",
"eventId": "timel000000000103609",
"ownerID": "emplo000000000096641",
"locationId": "locat000000000003165",
"locationName": "IND-Bangalore-Karnataka",
"additionalData": {
"#type": "map",
"locationTimeZone": "tzone000000000000042",
"eventID": "class000000000013497",
"locationName": "IND-Bangalore-Karnataka",
"locationId": "locat000000000003165",
"transcriptID": "ofapr000000002962367",
"registrationID": "regdw000000001766254",
"eventName": "Microservice Application Architecture",
"moduleID": "regmd000000002147176",
"courseID": "cours000000000031995"
},
"startDate": {
"#type": "com.saba.customtypes.DateWithLocale",
"date": 1538613000000,
"locale": "03-OCT-2018",
"timeInLocale": "8:30 PM",
"dateInUserTimeZone": "03-OCT-2018",
"timeInUserTimeZone": "5:30 PM",
"dateInCustomTimeZone": null,
"timeInCustomTimeZone": null,
"customTimeZoneDate": 0,
"timeInStandardFormat": "8:30 PM",
"dateInStandardFormat": "10/03/2018"
}
}
The first task here is to gather this object. Let's suppose the nested json array is always in the second position after the string and that the JSON object you want is always at the first position of the nested array which might not be the case depending on your input JSON but this was not precised in your question.
JSONArray mainArray = new JSONArray(resp);
// The nested array is at the second position : 1
JSONArray nestedArray = mainArray.getJSONArray(1);
// the interesting main JSONObject is on the first position
// of the nested array : 0
JSONObject interestingJSONObject = nestedArray.getJSONObject(0);
So now we want "courseId" from "additionnalData" Json Object :
String courseId = interestingJSONObject.getJSONObject("additionalData").getString("courseId");
And there you go!
I have json file in below format.
{
"data":[
{
"prjId": 1,
"name" : "Forj1",
"issue": [
{
"id": 00001,
"status" : "Closed"
},
{
"id": 00002,
"status" : "Open"
}
]
},
{
"prjId": 2,
"name" : "Forj2",
"issue": [
{
"id": 00003,
"status" : "Closed"
},
{
"id": 00004,
"status" : "Open"
}
]
}],
"issueCounter": 7,
"success": true
}
Here "data" is array of projects, and within project attribute there is array of "issue".
So far if I remove "issue" array, I am able to traverse the json to one level down in "data" attribute, If this json has "issue" array I get an error saying missing comma.
javax.json.stream.JsonParsingException: Invalid token=NUMBER at (line no=15, column no=14, offset=242) Expected tokens are: [COMMA]
Below is the code that I have right now. I have two problems with this, one is the error while reading if I place the "issue" attribute, and secondly a way to read the "issue" array and traverse all attributes within.
InputStream fis = new FileInputStream(pathToFile+"data3.json");
JsonReader jsonReader = Json.createReader(fis);
//the error is thrown on below line while reading the above json.
JsonObject jsonObject = jsonReader.readObject();
jsonReader.close();
fis.close();
System.out.println(jsonObject.getInt("issueCounter"));
//reading arrays from json
JsonArray jsonArrayData = jsonObject.getJsonArray("data");
Project [] prj = new Project[jsonArrayData.size()];
int index = 0;
for(JsonValue value : jsonArrayData){
JSONObject jsonObj = new JSONObject(value.toString());
System.out.println(jsonObj.getString("name"));
System.out.println(jsonObj.getInt("prjId"));
//this is also the place where I am stuck, I know I need to construct an array out of it by obtaining issue attribute. Below is very very wrong.
/*
JsonArray jsonArrayIssue = jsonObj.getJsonArray("issue");
for(JsonValue issue : jsonArrayIssue){
JSONObject jsonIssueObj = new JSONObject(issue.toString());
System.out.println(jsonIssueObj.getString("status"));
System.out.println(jsonIssueObj.getInt("id"));
}
*/
}
Any help or pointers is deeply appreciated. I can tweak the json if its required ultimately I need to maintain an array of issues.
The problem as others said is the JSON.
"id": 00001 <-- this is a number, numbers cannot start with a leading zero as per JSON stadard.
If you control the JSON you should tweak it.
Alternatively ff you don't, you can use a less strict parser like org.json.simple https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple
The code will be the same as yours, just adjusted to org.json.simple
try { ...
JSONObject rootJSON = (JSONObject) new JSONParser().parse(jsonString);
JSONArray dataList = (JSONArray) rootJSON.get("data");
for(Object projectObj: dataList.toArray()){
JSONObject project = (JSONObject)projectObj;
JSONArray issueList = (JSONArray) project.get("issue");
for(Object issueObj: issueList.toArray()){
JSONObject issue = (JSONObject) issueObj;
//do something with the issue
}
}
} catch (ParseException e) {
//do smth
e.printStackTrace();
}
Your json data is invalid.You can check here.
http://jsonlint.com
...issue": [{ "id": 00001,
"status": ----------------------^
Your id must be string number,string,boolean.Send 1,2,3,.... as return values and check if it works.
Your code looks okay the problem is the JSON formatting. Specifically the following lines:
"id": 00001,
"id": 00002,
"id": 00003,
"id": 00004,
Basically if you want it in that format you will need to set them as strings by wrapping the values in quotations i.e. "id": "00001" or you can use a valid number i.e. "id": 1
At the moment i'm trying to understand json and how it works.
But i have a problem with an array of objects.
all objects in the array have a key called "value" (i know it's weird, it's not my code) what also is an object.
And now to the problem: This object called "value" has always different key-values.
So i dont now how i can parse the json code to java object code, when it differ, every time.
Here some examples:
First object of the array:
"value":
{
"local":
[
"English", "Deutsch", Espanol"
],
"english":
[
"English", "Deutsch", Espanol"
],
},
Second object(now a string, not object) of the array:
"value" : "",
Third object of the array:
"value" : {},
...
Maybe I'm doing the parsing wrong.
First I have created the beans classes in java for the json code and then I'm using the automatic parser of google. (gson)
It works when only one of the examples above is inside the json code. (it should not differ, like changing from string to object...)
Gson gson = new Gson();
Output output = gson.fromJson(json, Output.class);
Output is the main class for the json stuff.
I have found out that maybe while parsing I could check a value called "id" first, and from that I could create another beans class with the right variables ...
Thats the code i need to parse to java objects and how do you do that??
The problem is the key called "value", because its always different.
With my method of using the google parser "gson" it wont work, because i'm getting exception that its an string but i was waiting for an object...
{
"status":"success",
"data":{
"panel":{
"title":{
"label":{ "local":"Tote Selection", "english":"Tote Selection" },
"image":"public/img/pick.jpg", "type":"default"
},
"isFirst":false, // currently not used
"isLast":false, // currently not used
"ownCount":0, // currently not used
"panelsCount":0, // currently not used
"elements":[
{
"type":"text",
"id":"1", "value":{ "local":"Scan next order tote",
"english":"Scan next order tote" },
"label":{ "local":"", "english":"" }, "color":"000000",
"fontsize":18, "fontstyle":"flat", "alignment":"left",
"rows":"undefined", "bgcolor":"", "isFocus":false
},
{
"type":"text",
"id":"4", "value":{ "local":"Scan tote: ", "english":"Scan tote: " },
"label":{ "local":"", "english":"" }, "color":"000000", "fontsize":20,
"fontstyle":"strong", "alignment":"left", "rows":"undefined",
"bgcolor":"", "isFocus":false
},
{
"type":"input",
"id":"6", "value":"", "label":{ "local":"", "english":"" },
"color":"000000", "fontsize":24, "fontstyle":"flat", "alignment":"left",
"rows":"undefined", "isFocus":true
},
{
"type":"button",
"id":"1", "value":{ "local":"", "english":"" },
"label":{ "local":"Menu", "english":"Menu" }, "color":"000000",
"fontsize":14, "fontstyle":"strong", "alignment":"left",
"rows":"undefined", "isFocus":false
},
{
"type":"button",
"id":"4", "value":{ "local":"", "english":"" },
"label":{ "local":"Enter", "english":"Enter" }, "color":"000000",
"fontsize":14, "fontstyle":"strong", "alignment":"right",18
"rows":"undefined", "isFocus":false
}
]
},
"authToken":"0fdd440a-619f-4936-ab74-d189accb5bd9",
"routing":{
"controller":"panel",
"action":"process",
"workflowId":"singlepicking",
"taskId":"orderSelection"
}
}
}
Thank you for your help!
it looks a little bit different but your answer helped me! Thx
JsonParser parser = new JsonParser();
JsonObject obj = parser.parse(br).getAsJsonObject();
//now getting all the json values
String status = obj.get("status").getAsString();
JsonObject data = obj.getAsJsonObject("data");
String authToken = data.get("authToken").getAsString();
JsonObject routing = data.getAsJsonObject("routing");
String controller = routing.get("controller").getAsString();
String action = routing.get("action").getAsString();
String workflowId = routing.get("taskId").getAsString();
If I understood ur question properly u can retrieve the values of the JSONArray as below
for (int i = 0; i < JArray.length(); i++) {
print(JArray.getJSONObject(i).tostring())
}
So if i am right u are getting the JSON from a String First?? so please try below first store the String in JSONObject as JSONObject obj = new JSONObject(str);//str is the string that u are getting
to get the valueenglish that are in data-panel-tittle-label is
String englishinLable=obj .getJSONObject("data").getJSONObject("panel").getJSONObject("title").getJSONObject("label").optString("english")
I'm using the package org.json to parse a JSONArray (I have the json strings saved in a database). However, I don't succeed in parsing it when the same key could have associated a String or a JSONObject, depending on the context.
For example, see the following JSON code...
[ { "cssClass" : "input_text",
"required" : "undefined",
"values" : "First Name"
},
{ "cssClass" : "checkbox",
"required" : "undefined",
"title" : "What's on your pizza?",
"values" : { "2" : { "baseline" : "undefined",
"value" : "Extra Cheese"
},
"3" : { "baseline" : "undefined",
"value" : "Pepperoni"
}
}
}
]
In the code above, the key "values" has 2 possibilities...
A String with value "First Name"
A JSONObject with value {"2":{"value":"Extra Cheese","baseline":"undefined"},"3":{"value":"Pepperoni","baseline":"undefined"}}.
How am I able to process this correctly when the value could be 2 different data types?
You'll probably still need to detect whether it is a JSONObject or a String, so that you can process it further, but perhaps something here might help...
You could try something like this...
String cssClass = myJson.getString("cssClass");
if (cssClass.equals("input_text")){
// Read it as a String
String values = myJson.getString("values");
}
else if (cssClass.equals("checkbox")){
// Read it as a JSONObject
JSONObject values = myJson.JSONObject("values");
// further processing here
}
Or maybe something like this...
String cssClass = myJson.getString("cssClass");
String values = myJson.getString("values");
if (cssClass.equals("input_text")){
// do nothing - it's already a String
}
else if (cssClass.equals("checkbox")){
// Parse the String into a JSONObject
JSONObject valuesObject = new JSONObject(values);
// further processing here
}
Think it this way in js or java duplicate variable creation under same scope is invalid,so to avoid ambiguity put them in separate json object with different variable names before putting it to the json array.